Quarterly report pursuant to Section 13 or 15(d)

Other Non-Current Assets (Details)

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Other Non-Current Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Other Assets, Noncurrent [Abstract]    
Advances made under EPC and non-EPC contracts $ 19,766 $ 32,049
Advances made to municipalities for water system enhancements 88,151 89,953
Tax-related payments and receivables 25,197 27,615
Information Technology Service Assets 30,156 30,371
Other 57,361 52,043
Total other non-current assets $ 220,631 $ 232,031